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kernel-doc: add support for specifying extra files for EXPORT_SYMBOLs

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If the kernel-doc comments for functions are not in the same file as the
EXPORT_SYMBOL statements, the -export and -internal output selections do
not work as expected. This is typically the case when the kernel-doc
comments are in header files next to the function declarations and the
EXPORT_SYMBOL statements are next to the function definitions in the
source files.

Let the user specify additional source files in which to look for the
EXPORT_SYMBOLs using the new -export-file FILE option, which may be
given multiple times.

The pathological example for this is include/net/mac80211.h, which has
all the kernel-doc documentation for the exported functions defined in a
plethora of source files net/mac80211/*.c.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula 2016-06-07 11:00:52 +03:00
parent 1ad560e43c
commit 88c2b57da4
1 changed files with 37 additions and 2 deletions
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39
scripts/kernel-doc
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@ -61,10 +61,10 @@ Output format selection (mutually exclusive):
Output selection (mutually exclusive):
-export Only output documentation for symbols that have been
exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
in the same FILE.
in the same FILE or any -export-file FILE.
-internal Only output documentation for symbols that have NOT been
exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
in the same FILE.
in the same FILE or any -export-file FILE.
-function NAME Only output documentation for the given function(s)
or DOC: section title(s). All other functions and DOC:
sections are ignored. May be specified multiple times.
@ -76,6 +76,9 @@ Output selection modifiers:
-no-doc-sections Do not output DOC: sections.
-enable-lineno Enable output of #define LINENO lines. Only works with
reStructuredText format.
-export-file FILE Specify an additional FILE in which to look for
EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL(). To be used with
-export or -internal. May be specified multiple times.
Other parameters:
-v Verbose output, more warnings and other information.
@ -336,6 +339,8 @@ use constant {
my $output_selection = OUTPUT_ALL;
my $show_not_found = 0;
my @export_file_list;
my @build_time;
if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
(my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
@ -488,6 +493,9 @@ while ($ARGV[0] =~ m/^-(.*)/) {
} elsif ($cmd eq "-internal") { # only non-exported symbols
$output_selection = OUTPUT_INTERNAL;
%function_table = ();
} elsif ($cmd eq "-export-file") {
my $file = shift @ARGV;
push(@export_file_list, $file);
} elsif ($cmd eq "-v") {
$verbose = 1;
} elsif (($cmd eq "-h") || ($cmd eq "--help")) {
@ -2747,6 +2755,25 @@ sub map_filename($) {
return $file;
}
sub process_export_file($) {
my ($orig_file) = @_;
my $file = map_filename($orig_file);
if (!open(IN,"<$file")) {
print STDERR "Error: Cannot open file $file\n";
++$errors;
return;
}
while (<IN>) {
if (/$export_symbol/) {
$function_table{$2} = 1;
}
}
close(IN);
}
sub process_file($) {
my $file;
my $identifier;
@ -3081,6 +3108,14 @@ if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
close(SOURCE_MAP);
}
if ($output_selection == OUTPUT_EXPORTED ||
$output_selection == OUTPUT_INTERNAL) {
foreach (@export_file_list) {
chomp;
process_export_file($_);
}
}
foreach (@ARGV) {
chomp;
process_file($_);